<template>
  <div class="tab-bar-item" @click="itemClick">
    <!-- 设置具名插槽 -->
    <div v-if="!isActive"><slot name="item-icon"></slot></div>
    <div v-else><slot name="item-icon-active"></slot></div>
    <div :style="activeStyle"><slot name="item-text"></slot></div>
  </div>
</template>

<script>
export default {
  name: "TabBarItem",
  props: {
    path: String,
    
    /* 设置默认文字活跃状态的颜色 */
    activeColor: {
      type: String,
      default: 'pink'
    }
  },
  data() {
    return {
      // isActive: true
    };
  },
  computed: {
    isActive() {
      //indexOf返回指定字符str在字符串中第一次出现处的起始索引,如果此字符串中没有这样的字符,则返回 -1
      return this.$route.path.indexOf(this.path) !== -1;
      // 或者 return this.$route.path == this.path 
    },
    
    //动态设置颜色 
    activeStyle() {
      return this.isActive ? {color:this.activeColor} : {}
    }
  },
  methods: {
    itemClick() {
      if (!this.isActive) {
        this.$router.push(this.path);
      }
    },
  },
};
</script>

<style scoped>
.tab-bar-item {
  flex: 1;
  text-align: center;
  height: 49px;
  font-size: 10px;
}

/* 设置图片 */
.tab-bar-item img {
  width: 24px;
  height: 24px;
  margin-top: 3px;
  vertical-align: middle;
  margin-bottom: 2px;
}


</style>
